If you get something less than 37 returned by the above command, it means that your current Qube supervisor version is older than 6.910-20, and that you need to update your MySQL database tables first, before you can upgrade the database schema. To do so:

On a command prompt, run the upgrade_supervisor program that you just downloaded.

Check that there weren't any critical errors reported by upgrade_supervisor.

Check that the version is now indeed updated to 37, by running the mysql -u root -e 'SELECT * FROM qube.tableversion' command again

Choose a destination folder on your supervisor for the MySQL csv files. Make sure that your user and the mysql server process both have write permission to this folder and all its parent folders, and that the volume is sufficiently large. Also note that a faster disk, such as an SSD, will help speed up the export/import process.

Tip

title

On CentOS 7.x and possibly other Linux distros, create a working directory under /opt and do the export while running as the root user

Do NOT use /tmp, /var/tmp (/usr/tmp), or any subdirectories under them. These OSs give the MySQL service its own private /tmp and /var/tmp folders, which prevents the mysqldump command from running correctly. Creating a subdirectory under /root does not work either, nor will a subdirectory in any user's home directory, since non-root users home directories are usually mode 700, so the MariaDB server can't access it.

One approach that doeswork is creating a directory under /opt and opening up the permissions:

No Format

sudo mkdir -p /opt/mysql_dump
sudo chmod 755 /opt/mysql_dump

Then, install the export_data_from_mysql.py script from the next step into this directory as the root user, and run the export script as root.

On a command prompt, go to the destination folder, and run export_data_from_mysql.py. Running it without any argument will create a subfolder in the current directory named "qube_mysqldump" and dump all files into it.

Code Block

python export_data_from_mysql.py

You may override the dump subfolder and DB username, password, and mysql install location. Run "export_data_from_mysql.py -h" to see the list of options.

Sit back. This process can take a long time to complete, depending on how many jobs you have on the system.

Once the process completes, make sure there were no errors reported on the terminal. Also have a look a the dump directory to confirm that there is a subfolder "qube" and a bunch of subfolders like "<number>qube" .

Take a note of the dump directory location, and proceed to the next step, "Upgrade the Supervisor".